02-05-2023, 12:19 PM
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Cardstock Designer
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Join Date: Oct 2012
Location: Nikiski, Alaska
Posts: 353
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AirBlast Ejection
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Originally Posted by Bill
Another thought, and you know dangerous that can be...
If you need added strength in a section, instead of using thicker cardstock, consider borrowing an idea from the Atlas. Put an inflated balloon inside. Fill it with helium to lower weight; is that enough of a difference to help the CG if placed in the lower sections? It is counter-intuitive, but water vapor is also lighter than dry air.
Bill
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Thank you Bill!
You planted the thoughts of a balloon in these rockets. Will be soon experimenting with a balloon ejection system: AirBlast Ejection
Using Estes ejection: shuttle in ejection tube that has a thumbtack nosecone. Reaches the balloon: Ka-Blooey!
Asked Estes some questions, their reply really didn't help, so now have a back-up plan for deploying the chute.
Guess their reply was the best answer I could have received, combined with your thoughts on a balloon: here is the result! Plan to respond to their survey now.
R/C version can be made, cat 5 wire to 32awg nichrome wire: for now will be using de-thermalling fuse to test the idea. Super light weight, gets rid of need for wadding, can be regulated by size type and how much PSI the balloon is blown up too.
Speaking of Wadding: Has anyone ever tried super gluing a length of parachute shroud to the rocket and wadding to re-use it? Length would be how far does it need to reach from attached point on rocket. Allowing to be re-positioned into original space as needed. Shouldn't interfere with parachute deployment if located correctly.
Mike
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